Erratum to: Fluid-structure coupling analysis of multi-DOF motor considering hydrodynamic bearing’s cavitation effect

A permanent magnet spherical motor (PMSpM) is a representative multiple degree-of-freedom electric apparatus. This paper proposes new analytical models for the PMSpM with stepped cylindrical permanent magnets (PMs). The research is not only to obtain the magnetic field and torque models of the PMSpM but also to yield a potential analytic tool for the spatial magnetic field and torque decomposition. The model decomposition aims to acquire a potential tool for the future research on PMSpM topology optimization and working mechanism. To achieve the two research targets above, the toroidal expansion method is used for magnetic field modeling, and the finite element method verification and experimental verification are conducted. Then, forces and torques are deduced from the Lorentz force law. In addition, a prototype PMSpM has been produced and the comparison studies of the air-gap flux density and torque among decomposed components are conducted using finite element analysis results and experimental results. It is concluded that the proposed analytical PMSpM models and the model decomposition method are proved.

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Toroidal expansion based modeling and analysis of spherical motor with stepped cylindrical permanent magnets

Zhou

Wang

et al. 2022

International Journal of Applied Electromagnetics and Mechanics

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Erratum to: Fluid-structure coupling analysis of multi-DOF motor considering hydrodynamic bearing’s cavitation effect

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Toroidal expansion based modeling and analysis of spherical motor with stepped cylindrical permanent magnets

Toroidal expansion based modeling and analysis of spherical motor with stepped cylindrical permanent magnets

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